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AT83C24B_05 Datasheet, PDF (1/42 Pages) ATMEL Corporation – Smart Card Reader Interface with Power Management | |||
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Features
⢠Smart Card Interface
â Compliance with ISO 7816, EMV2000, GIE-CB, GSM and WHQL Standards
Card Clock Stop High or Low for Card Power-down Modes
Support Synchronous Cards with C4 and C8 Contacts
Card Detection and Automatic de-activation Sequence
Programmable Activation Sequence
â Direct Connection to the Smart Card
Logic Level Shifters
Short Circuit Current Limitation (see electrical characteristics)
8kV+ ESD Protection (MIL/STD 883 Class 3)
â Programmable Voltage
5V ±5% at 65 mA (Class A)
3V ±0.2V at 65 mA (Class B)
1.8V ±0.14V at 40 mA
â Low Ripple Noise: < 200 mV
⢠Versatile Host Interface
â ICAM (Conditional Access) Compatible
â Two Wire Interface (TWI) Link
Programmable Address Allow up to 8 Devices
â Programmable Interrupt Output
â Automatic Level Shifter (1.6V to VCC)
⢠Reset Output Includes
â Power-On Reset (POR)
â Power-Fail Detector (PFD)
⢠High-efficiency Step-up Converter: 80 to 98% Efficiency
⢠Extended Voltage Operation: 3V to 5.5V
⢠Low Power Consumption
â 180 mA Maximum In-rush Current
â 30 μA Typical Power-down Current (without Smart Card)
⢠4 to 48 MHz Clock Input, 7 MHz Min for Step-up Converter (for AT83C24)
⢠18 to 48MHz Clock input (for AT83C24NDS)
⢠Industrial Temperature Range: -40 to +85°C
⢠Packages: SO28 and QFN28
Smart Card
Reader
Interface with
Power
Management
AT83C24B
AT83C24NDS
Description
The AT83C24 is a smart card reader interface IC for smart card reader/writer applica-
tions such as EFT/POS terminals and set top boxes. It enables the management of
any type of smart card from any kind of host. Up to 8 AT83C24 can be connected in
parallel using the programmable TWI address.
Its high efficiency DC/DC converter, low quiescent current in standby mode makes it
particularly suited to low power and portable applications. The reduced bill of material
allows reducing significantly the system cost. A sophisticated protection system guar-
antees timely and controlled shutdown upon error conditions.
The AT83C24NDS is a dedicated version approved by NDS for use with NDS Video-
Guard conditional access software in set-top boxes. All AT83C24 datasheet is
applicable to AT83C24NDS. The main differences between AT83C24 and
AT83C24NDS are listed below:
1/ CLASS A card supplied with CVCC = 4.75 to 5.25V for AT83C24NDS,
CLASS A card supplied with CVCC = 4.6 to 5.25V for AT83C24
2/ 18MHz minimum on input clock for AT83C24NDS
3/ Up to 10µF for capacitor connected on CVCC pin for AT83C24,
3.3µF mandatory for AT83C24NDS
4234FâSCRâ10/05
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